How to amplify the digital signal of an antenna, where to point it

From October 14, 2021, analogue broadcasting will end. Only digital TV transmitters of the DVB-T2 standard remain. The essence of the problem is that the operating frequencies of the new generally accepted UHF television broadcasting standard are 400 - 800 megahertz, depending on the region.

What is your signal from the antenna?

Stable

4.65%

disappears

95.35%

Votes: 129

Whereas in the previous one, analog, meter waves were used at frequencies much lower. They propagated in space better due to the higher penetrating power of radio waves. However, there is good news - thanks to the latest modulation and compression standards, digital television has better quality.

The redundancy of the transmitted signal allows subscriber equipment to operate even on a multiply reflected signal with a poor signal-to-noise ratio. Due to its mass availability, a set of digital terrestrial TV receiving equipment is inexpensive compared to satellite ones - a set-top box receiver costs around 1,000 rubles, high-quality antenna equipment costs about 1,500 rubles.

What is an antenna amplifier and how does it work?

A TV antenna signal amplifier is a device whose task is to make the impulse resulting from the influence of an electromagnetic wave more powerful than the one initially received.

Principle of operation:

1. An electromagnetic wave impinges on the conductor that makes up the TV antenna. This happens very quickly because it travels at the speed of light.
2. As a result of electromagnetic induction, a current pulse appears in the conductor. However, its strength is not sufficient for correct operation.
3. The pulse enters the amplifier.
4. The device, using a current voltage of 5 to 12 volts, forms a “copy” of the received signal, which already has greater power.
5. A tuner (internal or built into the TV) deciphers the signal, turning it into sound and video.

In addition to increasing power, the amplifier additionally filters the signal. In any antenna, in addition to the required range, there are always various unnecessary currents circulating - interference from operating electrical equipment, unnecessary stations, etc. The amplifier cuts off all unnecessary and increases the level of only useful signals.

Top 3 TV signal amplifiers

The rating includes devices designed to solve various problems and showing the effectiveness of use and ease of installation.

UAT-219 (UHF)

The amplifier is designed for installation in a cable line break. Supply voltage 12V. Connection using F-connectors is provided. The device is made in a steel case, shows 10 dB gain for channels 1-12, 25 dB for channels 21-69. The amplifier is designed to increase the signal level, compensate for line losses, reduce noise and neutralize interference . Capable of operating effectively with a repeater range of up to 70 km.

Pros:

• ease of installation;
• functional;
• efficiency of use;
• lightning protection.

Minuses:

• different gain within the frequency range;
• average level of self-noise;
• it is necessary to connect power through a separator;
• Only the amplifier is included in the package.

JMA 8620SA2

A simple, reliable TV antenna amplifier with the ability to adjust the gain. Designed for cable and terrestrial television. The device is made of aluminum, is intended for indoor use, and has a wall mounting system. Power supply 220V. A maximum gain of 20 dB is provided, adjustment within 10 dB.

Pros:

• two TV outputs;
• identical CG at two outputs;
• gain control;
• can work as an active splitter;
• complete set (connectors included).

Minuses:

• utilitarian appearance;
• no protection from water;
• no lightning protection;
• Over time, the adjusting screw is broken with a screwdriver (soft plastic).

To enhance or not

The task of the amplifier is to make sure that the level of the television signal passed from the antenna through the cable to the TV receiver becomes sufficient for the tuner to operate. Therefore, it is only necessary when the pulse power is too low.

For it to work correctly, 2 simple conditions are enough:

• presence of signal;
• proper operation of the antenna and cable.

But in the following cases, the amplifier may be harmful:

• The antenna receives a TV signal of sufficient power. Due to the specifics of the DVB-T2 standard, overamplification will lead to “artifacts” (for example, the overlapping of several programs on one another on one channel).
• The antenna receives the TV signal too poorly. To amplify, you need a high-quality original, otherwise the device will not work. There is no point in increasing the noise power.

For proper reception you need a good outdoor (or powerful indoor) antenna. There is no point in purchasing an amplifier for low-power “two sticks” or “wire loops”.

Do I need an amplifier?

Sometimes an amplifier is simply not needed. If you just brought the TV to your dacha or country house, it’s better to check right away whether it’s worth spending the money on. For such a check you will need the TV itself and a piece of any wire. The latter needs to be inserted into the antenna connector and its free end must be twisted in different directions, as if trying to tune it. These actions are absolutely safe.

If you manage to catch 2-3 channels with normal sound and a fairly tolerable image, you won’t need an amplifier. This means that the signal passes well in this area and a regular antenna will be quite sufficient.

Otherwise, you can't do without an amplifier.

What factors influence the deterioration of a TV signal?

The reasons for interference in broadcasting may be different. The most common of them:

• distance of the TV from the repeater;
• unsuitable TV antenna;
• a large amount of noise within the antenna radius;
• physical obstacles to signal transmission (high-rise buildings, trees, industrial buildings);
• non-working condition of the cable;
• incorrect orientation of the transmitter;
• metal structures near the antenna;
• signal distribution to several receivers;
• outdated technology.

What is a TV antenna booster?

A television amplifier is a device for amplifying a television signal and reducing the level of interference, which ensures the display of a higher quality picture. The device helps to increase sensitivity, limited by noise effects, and compensate for losses of the received television signal in the coaxial cable.

Design Features

Amplifiers for television antennas are simple and can vary in design. In some cases, they are formed by two boards with an implemented noise reduction circuit. One circuit is a high-pass filter, the second has a capacitor that regulates frequencies.

The regulator helps to obtain a maximum TV signal gain of 4.7 dB with an operating frequency of 400 MHz. To obtain stability, they use a stabilizer with an electrolyte and a diode bridge included in its circuit. The amplifier is connected to the television receiver using a capacitor.

All amplifiers are equipped with a power supply, only the location of its placement differs (built-in and external). The built-in device functions well with a stable electrical voltage and will consume up to 10 V. If the device burns out, the entire antenna device will need to be replaced. For this reason, in the presence of power surges, it will be more convenient to use external units. They are larger in size and have different input voltages depending on the amplifier (5, 12, 18, 24 V).

Classification

For on-air waves, TV channels use a range of meter (MV) and decimeter (UHF) frequencies. In the first case, a frequency of 30-300 MHz is used, and in the second - 300-3000 MHz. Depending on the range of the received frequency, the amplifier can be:

• broadband - to cover a wide wave spectrum;
• band - uses the meter or decimeter range for work;
• multi-band , designed for both bands.

In the usual case, with a good signal, a wideband amplifier is sufficient. If reception is poor, you should use a narrowly targeted device, which performs its role better than a broadband device in a certain range.

Digital broadcasting is carried out using the DVB-T2 standard. For digital TV channels, only the UHF range is used, so an amplifier of this range is suitable for digital television broadcasting.

Amplifiers also differ according to the required voltage:

• Twelve-volt ones are the most common. They will require the addition of an additional power supply, which in some cases can be regulated.
• Five-volt ones can be connected to a TV tuner or TV using a coaxial cable. As a rule, they are attached to the antenna.

Depending on the type of television, amplifying devices are classified in the following order:

• antenna;
• satellite;
• cable

Cable and satellite amplifiers are used very rarely, because they already transmit a very high-quality signal. Sometimes with cable television they use an amplifier if the cable is connected to several TVs at once. Antenna amplifying devices are used much more often.

Advantages and disadvantages

When setting up a home television network, you should remember: if you use several amplifying circuits, the video stream will be significantly distorted. In this regard, the number of amplifiers for antennas should be minimal.

The advantages of amplifiers include:

• the ability to receive even the weakest TV signals;
• presence of small noise coefficients;
• the ability to amplify the signal simultaneously across several frequency ranges.

The disadvantages of amplifying devices are:

• if a broadband amplifier is used, there is a possibility of overloading the permissible level of the TV signal, so it must be equipped with a regulator for different ranges to eliminate such a nuisance;
• self-excitation of the device;
• susceptibility to thunderstorms;
• probability of TV signal loss at the output.

Amplifiers correct the signal from the antenna to the TV. In this regard, the choice is influenced by the terrain and the need for television equipment. An amplifier for a TV antenna outside the city helps to effectively solve the difficult issue of obtaining a high-quality television signal.

Signal amplification methods

Before purchasing an antenna amplifier for your TV, you can try to adjust the signal quality using the following methods:

• Change the location of the antenna. More precisely, point it towards the transmission tower.
• Increase the number of antennas to improve signal quality. They must be installed at the highest point. If this is a private house, then on the roof.
• Buy a more powerful satellite or terrestrial antenna, check the version of the set-top box.
• Remove all metal objects located near the receiver or antenna.
• Create a common-mode antenna array (CAP) effect. The goal is to make the signal phases the same.

Important! Check the version of the receiver (set-top box). If it is outdated or not designed to receive a digital signal, the steps described above will not help. Also, the TV signal amplifier will not work.

General recommendations

Before purchasing an antenna signal amplifier, check the quality of the equipment setup, the version of the digital set-top box and the integrity of the cable itself. When using a satellite or terrestrial antenna, you can turn the “dish” towards the broadcast source. And also remove all metal objects located near the antenna.

When choosing an amplifier, it is important to consider the type of source: terrestrial, satellite television. And also pay attention to the frequency, operating range (from 30 to 150 km), and gain. Consider the location of the device: indoors or outdoors.

And remember. You can always call a specialist to your home and consult whether you need an amplifier and what kind of equipment is best to buy.

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Classification of TV amplifiers

Amplifiers are divided into types:

• Mast. Those that are attached to the mast itself. Power is supplied to them via a coaxial cable. But this is precisely why such amplifiers do not last long, they can fail during a thunderstorm and lose quality due to oxidation of contacts. Mast amplifiers usually work for a couple of years.
• Internal. These are more convenient because they are located next to the receiver. True, signal losses still occur through the cable.

Antenna amplifiers are also divided into subtypes:

• Range. SWA and LSA devices, which are necessary when installing array antennas.
• Multi-band. Devices such as ALCAD and TERRA, which work for close and long-range reception. They are able to perceive several signals simultaneously from different sources and combine them into one.

In addition, all antenna amplifiers come with their own power supply. They are also different: adjustable and non-adjustable with external or internal design.

Criteria for choosing the right amplifier

If the equipment is chosen incorrectly, the user may get a result different from the desired one. For example, get rid of image imperfections on problematic channels and see them on others. Therefore, it is important to choose an antenna amplifier for digital TV exactly in accordance with the current situation.

Device class

Certain classes of devices have their own operating characteristics.

1. Broadband amplifiers have a precisely defined range of operating frequencies. In it they issue the same CG. The user may encounter a situation where they experience excessive signal on some channels. If such a problem occurs, it is recommended to choose a model with adjustable gain (gain). Some devices offer its change over the entire operating range. On others, regulators are installed to balance the heat exchangers in individual ranges.
2. Range amplifiers are convenient for users without special knowledge. When buying, for example, a model for cable television, the subscriber does not have to think about any settings. All he needs to do is connect the device to the cable network at the selected point. Amplifiers are offered for both the UHF range and satellite TV.
3. Multi-band devices are, roughly speaking, a group of amplifiers and their wave matching unit. You can choose a model for DVB T2 and satellite TV. It will not produce averaged overall parameters. Good multi-band amplifiers even offer gain control for individual passbands.

Number of outputs

Antenna amplifiers are divided by the number of outputs. Linear models are the simplest. They have one entrance and one exit. In an apartment with cable TV, you can use the amplifier as a branch point. You will need to buy a model with one input and two outputs. It is worth remembering that devices of this type usually offer different QUALITY for signals sent to individual consumers. Finally, the main amplifier will offer a group of outputs with absolutely identical signal parameters.

Operating voltage

The supply voltage of a particular model plays an important role. 12V DC will require an adapter to be installed. But this is a safe choice when it comes to powering an amplifier placed directly on the antenna. Devices in this category have average CP characteristics.

220V is always dangerous. But when installing the amplifier indoors, the user can protect it as well as he likes. At the same time, he receives high efficiency and stability of the device.

The last power category for amplifiers is 5V via the USB interface. This is a useless method when it comes to an external antenna. But for indoor use this food is ideal. First, the antenna can be connected to the TV port. Secondly, it does not need a separate outlet. Finally, the amount of wires and clutter is reduced.

Advantages and disadvantages of antenna amplifiers

The use of antenna amplifiers for UHF is both necessary and undesirable. Already at the planning stage of any home TV network, it is necessary to ensure that the number of amplifiers used is as small as possible. Each antenna amplifier tends to distort the video stream, and when several distortions are layered on top of each other, you can get the opposite effect to the expected one.

Using an amplifier with constant gain does not always lead to the expected effect. The disadvantage of this solution, oddly enough, is precisely its main characteristic - amplification. In many places it is necessary to receive broadcasts from several transmitters, or the repeater itself emits signals of different levels. Using a wideband amplifier over its entire operating range can result in excessively high levels of some frequencies. This, in turn, will lead to an overload of the permissible signal level that enters the input of the decoder or connector of the television receiver. The result will be a significant deterioration in reception quality parameters, which will lead to the disconnection of the connector itself. In such cases, amplifiers must be able to adjust the gain, but not over the entire operating range, but independently at individual frequencies.

Another feature is the way the amplifying circuit is powered. If your amplifier for a DVB-T2 digital television antenna requires a 5 Volt power supply, then it is better to supply it via cable from the tuner itself. It’s worse when the amplifier “asks” for 12 Volts. There are two possible options here, both with looming problems:

1. its power supply with a low-frequency transformer for a 50 Hz power supply. The unit is not as lightweight as pulse units for recharging a mobile phone; this unit does not produce high-frequency interference, but produces low-frequency ripples, which over time can degrade the performance of the antenna amplifier;
2. The power supply with pulse conversion is very light, practically does not heat up, does not produce low-frequency ripples, but is guaranteed to produce high-frequency interference, which is not at all useful to the amplifier.

Setup problems and solutions

There are situations when you correctly set up the reception of digital TV channels, watched them for a long time, and then suddenly stopped showing one or several of them at once. Or do you know that 20 channels are broadcast, but only 10 channels are found, what to do in such cases?

Let's look at the main problems that may arise during the process of setting up or operating digital television and methods for solving them.

1. The antenna does not receive or does not receive a digital signal well, but previously received an analog signal well. There may be several options: the antenna is not suitable for receiving a DVB-T2 signal, for example, it is designed for MV, not UHF; The distance to the repeater is too large and the gain of this antenna is not enough for reliable reception. In this case, only buying a new antenna or amplifier will help.
2. The antenna was tuned for quite a long time, after a while it stopped receiving a certain channel. Alternatively, the connection on one of the contacts may have broken or the wire has broken. All contacts should be checked for oxidation and the cable should be ringed.
3. The tuner does not receive a digital signal. Check if your set-top box does not support DVB-T2 format. Then only replacing it will help.
4. The amplifier used to work, but now it doesn't. Most likely, either the amplifier itself or its power supply has failed. It should be taken to a service center for diagnostics.
5. Shows only part of the 20 possible channels. Most likely, the antenna has insufficient gain, or is not aimed precisely at the repeater. To show more channels, you should buy a more powerful antenna or orient it more accurately in the direction of the tower.
6. Previously it showed 20 channels, but now only 10. The equipment was checked, everything is in order. – The set-top box settings may have gone wrong. In this case, you need to reconfigure the tuner or configure channels manually. If everything worked fine before, but over time problems began to appear, this may indicate the need to replace the equipment or its breakdown.

In general, if problems arise with signal reception, the action algorithm should be as follows:

• Checking the correct connections between all types of equipment: antenna, set-top box, TV, amplifier.
• Checking all receiver settings, adding data manually if necessary: ​​channel number, channel width, etc.
• Determining the location of the transmitter and orienting the antenna towards it as accurately as possible.

Depending on the terrain, it may be necessary to raise the antenna to a greater height.

• Using a tuner, we determine the maximum signal level for various antenna orientations.
• We perform automatic channel search.

If after all these manipulations our TV does not receive all channels, then it means we have a low-power antenna. As a rule, residents of large cities feel more confident when tuning in and watching digital television than residents of rural areas. This is due to the short distance to the transmitting tower, and, consequently, more reliable reception.

What types of amplifiers are there?

Devices that amplify television signals vary in classification and design.

There are devices for digital TV antennas and for analog signals. They have a power supply, both external and internal. The external unit is larger than the internal one, its input voltage depends on the amplifier, and can consume 5, 12, 18 or 24 V. The internal unit consumes up to 10 V, it requires a stable voltage of electricity. It may fail during power surges. If the unit burns out, you will have to replace the entire antenna completely.

Types of amplifiers depending on the received frequency

Devices according to classification are distinguished into:

• Broadband

These models are capable of covering a wide range of amplified frequencies. As a rule, they are used if the TV antenna signal is good, but does not provide an ideal image.

• Band

Designed to receive frequencies either meter (MV) - from 30 to 300 MHz, or decimeter (UHF) - from 300 to 3000 MHz. Can be used if the TV signal is very weak. Digital TV requires a UHF frequency range.

• Multi-band

Models with separate adjustment of different ranges.

According to the required voltage, they are divided into the following types:

• Five-volt.

They are connected using a coaxial cable and attached to the antenna.

• Twelve volt.

These devices work with a power supply.

Necessary equipment

If theater begins with a hanger, then digital broadcasting begins with the purchase of equipment. What will the user need?

What is already there: standard set-top box equipment

The set-top box for DVB-T2 (the broadcasting standard used in European countries and Russia) usually includes the following:

• How to set up DVB T2 on your TV

• The console itself. A digital tuner (receiver) that receives and converts a signal to transmit it to the ports of a TV receiver. Modern set-top boxes often have additional functions (recording to a flash card, delayed viewing, Wi-Fi support, etc.).
• Remote control. Almost all modern set-top boxes, starting from the middle price class, are equipped with IR remote controls.
• Power unit. It can be either internal, built into its body, or external. In the latter case, the kit includes an adapter that connects to an outlet and a connecting cable, from which power is supplied to the receiver.

Important: there are still old set-top boxes on sale that are designed for the DVB-T standard. They do not accept Russian multiplexes, so there is no point in purchasing them.

What else is needed: additional equipment

In addition to the set-top box itself, to connect you will need:

• Antenna. It is needed to receive a terrestrial or satellite signal. To watch digital TV from terrestrial repeaters, it is necessary to purchase a separate UHF antenna. It is not needed only in cases where “digital” is broadcast via cable broadcasting or if there is access to a community antenna with apartment wiring.
• Antenna cable and connecting plugs. Needed for . The rule usually applies: the higher the antenna is installed, the better the reception. But to connect it to the tuner you need a special coaxial cable. Since it is sold by the meter and cut to the length ordered by the buyer, you will need at least 2 more plugs to connect it to the antenna and TV receiver.
• RCA cable (bells). It transmits the signal from the set-top box directly to the input connectors of the TV. It usually has three plugs at the end: 1 for video and 2 for the right and left audio channels. This cable is used to connect the receiver to older TV models. The cable may be included with the set-top box, but sometimes it is missing. Then it will have to be purchased separately or replaced with the next type.
• HDMI cable. It is used for the same purposes as the bell, but is used in the latest models of receivers and television sets. Provides much better signal transmission, but cannot be used everywhere and therefore is usually not included in the kit.

Methods for ensuring reliable TV signal reception

There is no ready-made recipe. Each case is specific and requires an individual approach. What to do in this situation? In many cases, the signal does not require maximum amplification, just as it is not necessary to amplify the entire “bouquet” of signals.

To make sure which case we are really dealing with, it is necessary to accurately measure the signal level from the receiver antenna. This is necessary in order to understand whether we are receiving a direct or reflected signal (or even several), and determine further steps.

One way to get reliable reception is to correct the direction of the antenna or its location in height, and often both. Sometimes it is enough to move the antenna mast a meter or two to get much better quality broadcast.

It is also worth having a level meter on hand when you need to make sure whether the broadcast quality is sufficient and only requires additional amplification, or perhaps you are receiving a strong but excessive signal? In case of a strong signal, you can choose the right antenna. It may also be enough to deliberately change the direction of reception or the location of the antenna to weaken the signal while at the same time eliminating its reflected rays.

When receiving digital TV, you should remember that when strong radio frequency oscillations are superimposed on each other, you need to opt for a passive directional antenna without the use of any amplifying elements. The amplifier to the TV antenna in this case will contribute to intermodulation, which will lead to failures and instability of the digital decoder.

Methods for amplifying TV antenna power

In fact, ways to increase the power of a TV antenna can be correlated with medical approaches: use “therapy” or immediately go the “surgical” route. As for drastic measures, the very first step here is to change the antenna itself to a stronger and more expensive one. This also includes purchasing an active antenna instead of a passive one.

But you can act more gently, especially if your antenna has served you honorably for more than one year:

• experiment with the direction of reception;
• raise the antenna higher;
• if possible, clear the path for the signal;
• eliminate all “non-contacts”, replace the cable;
• equip the antenna with a signal amplifier. Many external antennas have the technological ability to install an amplification board if it turns out that one is needed.

Using an antenna amplifier

TV antenna signal amplifiers are the very first, after the antenna, to perform the initial correction of its level.

The type of device that's right for you depends on the reception conditions in your area and the specific needs of your entire TV installation. If you need to amplify the entire RF band, you can use a fixed gain broadband amplifier. If, on the contrary, in your region the correct reception of frequencies from the upper UHF band is significantly influenced by high-frequency transmitters and interference occurs, caused, for example, by passing cars or a neighbor's lawn mower, then you will need a different amplifier model - with a fixed gain, but with a limited operating range frequency

Modern amplifiers from various manufacturers have a fairly ergonomic shape, which, in fact, allows them to be mounted anywhere on the coaxial antenna cable. This means that you can use the amplifier in an existing antenna installation without having to disassemble the antenna. However, it should be remembered that due to the violation of the signal-to-noise ratio with increasing distance from the antenna, it is recommended to install it as close to the antenna as possible.

Why does the TV signal deteriorate?

It will not be possible to list all the reasons within the framework of this article, so it is worth limiting ourselves to only the most common of them:

1. Problems on the provider line. As a rule, companies providing such services regularly carry out preventive and repair work, which leads to temporary deterioration of the airwaves, noise and interference. The same applies to individual TV channels.
2. Equipment malfunction. If the user receives an analog signal from an antenna, then he must be prepared for constant interference and reduced image quality. Such antennas usually hang outside and are exposed to external natural factors, which negatively affects their service life. The TV set-top box, which is located next to the TV, can also fail.
3. Problem with cable or TV. For example, the wire through which the signal flows or the connector on the TV may break. In such a situation, the signal does not completely disappear, but only worsens.

4. Internet problems. For many people, the operation of their TV directly depends on the operation of their home Internet. If the Wi-Fi router produces a weak signal, then the data transfer speed over the network decreases. Thus, the Internet is slower and the TV signal is lost or weakened.
5. Extraneous noise. If you turn on other devices near the TV, for example, a microwave oven, the TV signal may deteriorate, because the device operates on a different frequency, creating interference with TV.

A message about no TV signal may look like this:

Most problems associated with weakening television signals can be solved independently at home. Those. There is no need to resort to the help of service centers.

Types of amplifiers for TV antennas for the garden and home

There is a generally accepted division of all digital signal amplifiers for TV, which can be purchased at a regular electrical goods store. They are divided into types according to frequency range and installation location. Broadband devices provide tuning on a large number of available frequencies

At the installation location

According to this parameter, all presented models are divided into two types - depending on the features of installation and installation of the device. So, all antenna amplifiers for a TV with 20 channels or more can be:

• internal , which are a small board that can be installed directly next to the receiver. In this embodiment, there may be deterioration of the signal entering the amplifier itself due to losses in the cable;
• remote or mast mounted , located on a long pole at the location of the antenna. Thanks to their long range, they provide a high-quality signal improvement. But the main disadvantage can be considered fragility, since a strong wind or lightning strike will eventually damage the device or completely disable it.

Connecting the amplifier requires a power source of 5 or 12 volts.

There is also a division into active and passive amplifiers. In the first case, the amplifier board is mounted directly on the antenna body. This allows you to receive more channels. But there are some disadvantages: frequent failure of the board under the influence of external factors and gradual oxidation of structural elements.

The second type involves the use of an external amplifier, which is purchased separately. This is a more profitable option, but requires additional configuration and installation of the device.

By frequency range

According to this criterion, all presented models can be divided into three types. Depending on the chosen category, different goals are pursued, since each type is used to achieve a specific result. Devices can be:

• broadband . Devices that are most often used as part of indoor home antennas for a TV with an amplifier. Their task is to improve the quality of broadcasting on a large number of receivers at once;

FOR YOUR INFORMATION !

This type of device demonstrates stable operation in both the decimeter and meter ranges.

• multi-band . Devices the use of which is advisable for receiving devices located on long masts. Most often, the use of this type is observed in private homes;
• range . Amplifiers that are needed to ensure high-quality reception from a source located at a considerable distance from the receiver. In addition to the signal correction function, these devices have the ability to reduce noise that appears as the cable length increases. Most often used to improve broadcasting of digital television in DVB-T format

TOP best amplifiers for antennas

Experienced specialists suggest familiarizing yourself with the rating of the best models of devices designed to improve the television signal. Each model has its own technical characteristics and individual features.

So, let’s present the most common and reliable brands of TV amplifiers:

1. Broadband TV amplifier SWA9001/999/9701. This model is directly connected to a television antenna and is powered by a signal reception cable. It does not have a built-in frequency range switch and initially operates at one frequency. It has good performance, reliability and durability. It has a durable housing that can protect the device from adverse weather conditions. In addition, the device is not expensive, which fully justifies its purpose.

2. Italian TV amplifier Televes. It has five outputs, which allows you to connect 5 antennas simultaneously. The device receives power from a removable battery, which is supplied in the kit. If the battery breaks, it can be easily replaced with a new one, which costs a penny. A minor drawback of the model under consideration is the relatively small gain of only 16 dB. However, the device has a low noise level and perfectly prevents various interferences. This TV amplifier can be recommended for home use.

3. Gecen A05-02. This model is often used to strengthen the satellite TV signal. The device has a wide frequency range from 950 to 2400 MHz. These indicators are quite sufficient for home use. Also, the device does not need to be connected to the network, because it receives power from a battery built into the case.

4. RTM LNA02. This model is suitable for owners of set-top boxes who are already tired of suffering from constant signal loss. It is easy to install on the antenna and does not require additional configuration after connection and activation. Capable of amplifying TV signals up to 20 dB. This is enough for home use. In addition, the build quality of the amplifier in question is at a high level.

5. Alcad Al-200. One of the most common models suitable for use in apartments. It has an average gain of 24 dB, as well as two outputs. This device operates from a 220 Volt outlet.

6. Wisi VM 8351. Has technical characteristics similar to the previous model. The device has a low cost and a long service life. This is a powerful mast-type device. It has two outputs and is mounted directly on the antenna. In addition, it is able to survive adverse weather conditions.

7. Terra HA126. This TV signal booster is intended for home use only. Its gain can reach 20 dB. Equipped with a built-in switch for adjusting the image on television channels. This is broadband type equipment, the frequency of which varies from 49 to 873 MHz.

The models discussed above are united by compactness and high resistance to interference and noise, which gives us the right to recommend them for purchase and subsequent use.

It is more convenient to compile the above information in the form of a table for complete understanding.

Name	Description	Price
SWA9001/999/9701	This is a broadband amplifier that is directly connected to the antenna and receives power from the battery with a gain of 16 dB.	80 rubles
Televes	Italian model with 16 dB of gain, with a removable battery and a high level of interference resistance.	2500 rubles
Gecen A05-02	It has a wide frequency range, designed to enhance the satellite television signal. Has a built-in battery with a high safety margin.	300 rubles
RTM LNA02	TV amplifier for set-top boxes with high build quality and a maximum gain of 20 dB.	290 rubles
Alcad Al-200	High-quality and powerful device with amplification up to 24 dB. The device does not need to be connected to an antenna, because it operates from a 220 V network.	990 rubles.
Wisi VM 8351	One of the most reliable amplifiers, having a durable housing that protects the microcircuit from external natural influences. The manufacturer guarantees the device durability.	2750 rubles
Terra HA126	The gain of this device reaches 20 dB. In addition, the amplifier has the ability to adjust the image quality on a single channel using a built-in switch. has a frequency range from 49 to 873 MHz.	1990 rubles

The television signal amplifiers come with instructions that describe in detail the stages of installing the device, as well as its main features.

When choosing an amplifier for your TV, do not forget to carefully inspect the device from all sides for chips, scratches and other defects. Such nuances may cause refusal of warranty service if the device breaks down. Also pay attention to the behavior of the sales consultant.

Based on the above, we can conclude that TV signal amplifiers cope well with the task and are capable of improving the quality of the image displayed on the screen. To better understand the topic, you need to familiarize yourself with the material in the article.

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How to boost a digital TV signal with your own hands for 20 channels

How to amplify a digital TV signal on your own for standard digital 20 channels:

1. Change the antenna position. It is important that it is directed in the direction where the tower is located.
2. Using an amplifier.
3. Adding additional television antennas.
4. Pay attention to interference - remove metal objects.
5. Check the cable, it may need replacing.

Gain selection

The presented criterion is responsible for receiving and decoding an incoming signal with a specific quality. In this case, the gain depends on the value of the gain. When selecting, it is important to take into account that the power of the amplifier must exceed the antenna parameter. Otherwise, it will not bring the desired result, and you will not notice the improved quality.

Basically, for DVB-T2, a gain of 32 dB is chosen. This indicator will be quite sufficient for a cable whose length does not exceed 32 meters. But, equally important is the choice of the antenna itself. Please note that if the signal level is insufficient, amplification will cause large noise.

Additionally, you can increase the cable length, but this will weaken the incoming signal. It is impossible to select the most accurate coefficient indicator. But, you can find out the approximate value.

Where to point the antenna to receive a digital signal

To correctly determine the location of television towers, use the official website - map.rtrs.rf. By going to the page, you will see a map with all repeaters in the country, including coverage areas. In the search bar located at the top, enter your city of residence. Images of all the towers in this area will appear on the map.

Click on the locality and check the distance of the repeaters. Data on broadcast frequency, numbering of TV channels, and the presence of multiplexes will also be demonstrated.

Power supply

The peculiarity of such equipment is hidden in the power supply, separate from the antenna. Today, amplifiers can be divided into two types depending on the power supply:

1. At 12 Volts. Often used for summer cottages or indoor antennas.
2. At 5 Volts. Suitable for continuous digital television broadcasts. Often used in sports bars.

Receiver setup

The steps to find digital channels will be as follows:

• Using the remote control, go to the main menu of the tuner.
• We find the item that is responsible for the settings.
• In the country field, select our country.
• Next, select the signal type, in our case DVB-T2.
• Select automatic setting.
• We wait a few minutes until the digital receiver finds available channels.

After successful completion of this procedure, we save the found channels and can view them at any time.

There are cases. When the automatic search cannot find any channel. This means that you will have to manually enter the settings. Then we do the same, but select manual search.

A window will open in front of us in which we must indicate the frequency at which digital channels are broadcast. Its meaning can be found on the Internet for your city.

Do-it-yourself digital TV signal amplifier - diagram

Before we look at the instructions for assembling your own amplifier, let's study the types of antennas currently in use:

1. Telscopic. Another name is core. It is characterized by simple manufacturing and is used at a distance of up to 5 km from the tower. It has circular polarization, which allows it to detect various radio waves.
2. Patch antennas. Basically, rectangular elements protected by plastic are used in production. Has vertical and horizontal polarization. The main advantage is the increased coefficient of gain and the ability to accept re-reflection.
3. Wave channel. Is the most used option. It is a structure of directors, reflectors and vibrators located on a traverse. The wave channel is often placed outdoors; models with reflectors can be found. They are also often equipped with amplifiers and filters.
4. Zigzag. The main advantage is the ease of assembly and the ability to accept reflection. That is, zigzag antennas can be easily assembled at home.

You can amplify the digital signal of a TV antenna at home using the last option, that is, using a zigzag antenna. In this case, the gain will depend on the number of squares. This way you can assemble the structure yourself, spending a minimum of money.

What is the operating principle of such equipment? Pay attention to the diagram where input 1 is shown - voltage is supplied through it. Having a resistor labeled R1 connected to input 2 will shift the voltage to the operating area. Output 6 accepts the input signal, and the amplified signal will be taken from the third node and sent directly to the receiver.

Sources

• https://ProDigTV.ru/efirnoe/antenna/usilitel
• https://odinelectric.ru/equipment/kak-usilit-signal-ot-tv-antenny
• https://tv-vybor.ru/stati/798-usilitel-tv-signala.html
• https://tvdigitally.ru/efirnoe-tsifrovoe-televidenie/televizionnyj-usilitel
• https://yanashla.com/luchshie-usiliteli-signala-dlya-antenny-televizora/
• https://tehno.guru/ru/usilitel-signala-dlya-antenny-televizora/
• https://ProDigTV.ru/efirnoe/antenna/kak-usilit-signal
• https://smarts-iptv.com/kak-usilit-plohoy-signal-cifrovogo-televideniya.html

When should you buy an amplifier?

You can determine that it’s time to buy a digital signal television amplifier by the quality of the picture and sound on the TV . For example:

• the channels ripple, snow, the picture crumbles into cubes or freezes;
• There are problems with image or sound only on some channels;
• the equipment used periodically produces errors;
• Reception quality drops as weather conditions worsen.

Which antenna amplifier to choose depends on the user’s situation and financial capabilities. Today, a huge variety of models with basic or advanced functionality are produced.

How to strengthen an antenna for a TV

Watching TV after a busy day is one way to relax. To watch TV at home, use a television or satellite antenna as a receiving device. Both types differ, so a regular antenna allows you to view up to 20 terrestrial TV channels, and a satellite antenna allows you to view much more. But it is much more unpleasant when there is interference with the image or even broadcasting. The problem is not always the TV; often the problem arises due to a weak signal.

The principle of operation of a TV antenna

Intermittent broadcasting distorts the picture and sound, but the problem is not always on the side of the television tower. The problem most often lies in the receiving device. You can try to amplify a weak signal to avoid noise and interference during viewing. Let's consider both types:

1. Satellite dish - the gain depends on how wide the dish is in diameter. There are several varieties, all of them outdoor.
2. Television can be indoor or outdoor (these are installed on the roofs of houses).

The quality of the signal in the second case depends on the proximity of the broadcast tower, the design and the presence of an amplifier. In other words, the antenna receives it, converts it through the receiver, and the image appears on the TV screen.

IMPORTANT! The quality of the signal does not depend on the type of television cable (if it is damaged, there will be no sound or picture at all). Therefore, if you have problems with broadcast reception, you should check the antenna.

Is it possible to boost the TV antenna signal?

You can further strengthen the signal by simply moving the device to another location - closer to the location of the tower. As a rule, it can be seen from afar by the red lights. If this does not help, it is recommended to purchase and install an additional amplifier.

IMPORTANT! It is safe to repair or improve a television antenna; it does not conduct electricity. However, you should take care of safety if it is located at a height - the roof or wall of the house.

The image quality is sometimes disrupted by interference that looks like snow—white, bright dots. If such a problem occurs, then it is definitely the noise of the television amplifier. It is necessary to change the orientation by turning towards the tower or even increase the height of its installation.

If the interference looks like stripes, constant freezing or shaking of the picture, then the TV is susceptible to interference. For example, this happens if there is a mobile phone nearby or another household appliance. But if home equipment can be turned off or moved, then the problem with external sources (radio signal, trains, cell towers, etc.) simply cannot be solved. It is recommended to change the antenna to one with a narrow directivity and high sensitivity specifically to the broadcast signal.

ADVICE! An easy way is to reduce the length of the television cable. In rare cases, this improves the signal.

How to strengthen a TV antenna yourself

There are three simple ways to boost your signal yourself. They do not require large expenses or specialized knowledge:

1. Use an amplifier - you can purchase it in a store and install it yourself.
2. Use connected devices - they will give the best signal. It is best to place them as high as possible.
3. Expand reception coverage - as with a plate, diameter matters. You can supplement a conventional antenna with thin wire, making a housing around it with segments similar to the type of rays.

The antenna can simply be moved by finding the optimal place to receive the signal. Such amplification methods are universal and, quite likely, they will be enough to improve the picture on the TV screen.

Features of connecting a signal amplifier to a TV

The most important thing here is that the device is located as close as possible to the TV, because cable losses have a significant impact on the image level. This requirement applies not only to personally assembled devices, but also to purchased ones. An exception can be made only for antennas with a short cable.

Do not forget to carefully read the instructions for checking and connecting the amplifier. This will help avoid many problems.

If you have connected a signal-amplifying device, but no positive changes have occurred in the picture level, then you should check the direction of the antenna and the wave correspondence of these devices to each other.

Remember that all actions must be performed with the equipment turned off from the network.

Do not connect the amplifier to an external antenna that is not equipped with lightning protection.

In conclusion, we note that when creating an antenna amplifier, one must strive not only to amplify the signal, but also to ensure that the device produces as little noise as possible. To achieve this, use high quality parts and stay at the minimum dimensions for the device.

How to connect an amplifier without special connectors

The easiest way to boost the signal of a television antenna to improve the quality of digital television broadcasts is to buy a ready-made device that is suitable in terms of parameters and broadcast frequency.

Connecting the equipment is easy. Let's look at a step-by-step diagram based on an open board for an antenna cable that is connected to a clamp:

1. Clamp connection – type of connection that is provided on antennas with amplifiers of the SWA series. For example, the Delta series antenna has two spaced contacts. To connect an antenna to them, you need to remove the insulation layer from the cable.
2. The insulation layer must be removed in stages. First, the upper cable braid and foil are removed. Then, there may be an additional layer of insulation. But there is only one tourniquet left inside. This is the central core of the cable.
3. The central core can be crimped with the contact clamp provided on the amplifiers without modification. You can solder the braid back to the core and contacts to provide a more reliable connection.

Important. When connecting the cable to the clamp, you must determine the correct polarity. This is the only way the assembled circuit will work.

It is easier to connect a cable with a SWA type clamp. There is no need to think about polarity, which reduces the possibility of making a mistake when amplifying a digital television signal to zero. The cable is crimped with a fastening bracket, ensuring reliable fixation. Preparing the wire is the same as the previous instructions - you need to free the central core.

But the most convenient way to connect an antenna amplifier is to use the option with a special F-connector. For connection, the wire is prepared and the antenna plug is installed.

Advice. If you do not know how to prepare cables or fix the central core, it is better to turn to the experts. Calling a specialist to your home will cost no more than 500 rubles. But you will save time and effort on connecting an antenna signal amplifier.

Sources

• https://tvdigitally.ru/efirnoe-tsifrovoe-televidenie/televizionnyj-usilitel
• https://cifrovoetv-rf.ru/how-to-amplify-your-own-digital-television-signal/
• https://GoGoSmart.ru/texnika/antenna/usilitel-antenny-dlya-televizora.html
• https://SdelaySam-SvoimiRukami.ru/3985-prostoy-universalnyy-antennyy-usilitel.html
• https://tehnika.expert/cifrovaya/televizor/kak-usilit-signal-antenny.html
• https://odinelectric.ru/equipment/kak-usilit-signal-ot-tv-antenny
• https://smarts-iptv.com/kak-usilit-plohoy-signal-cifrovogo-televideniya.html
• https://televizore.ru/obzor/usilitel-televizionnogo-signala
• https://homius.ru/usilitel-tv-signala-svoimi-rukami.html
• https://sdelatlegko.ru/antennyj-usilitel/
• https://tv-vybor.ru/stati/798-usilitel-tv-signala.html

How to make an amplifier with your own hands

If for various reasons there is no opportunity or desire to buy an amplifier in a store, you can make it yourself at home. The equipment will have low power consumption and will not create interference. Its frequency range is 900 MHz or slightly less.

To make an amplifier with your own hands, antennas for a TV use the following scheme:

The principle of operation of a TV antenna or how to improve the signal with a homemade product:

1. Voltage is supplied to input 1.
2. Resistor R1 produces a bias to the required zone. It is connected to the second input.
3. Output 6 receives the input signal. And at this moment the amplified television signal is removed from node 3 and goes to the receiver.

If you assemble the chip correctly, there is no need to configure it.

Many factors influence the reception of a television signal, and for this it is necessary to use amplifying devices. They have many advantages: high gain, mobility and a wide selection of models in stores.

Using the equipment, you can easily enjoy watching TV without interference.

Reasons for signal deterioration

Each reason for the deterioration of the air must be analyzed individually, since its reception depends on local conditions: on the direction in which the signal passes, what obstacles are in its path, on the presence of hills and tall buildings in your area.

Before you finally decide to use an amplifier for your TV, let's take a look at the most likely causes of TV signal deterioration.

• Transmitter Maintenance

In almost all cases of problems with TV display, the cause is on the user's side - cases on the sender's side are usually a break in servicing the transmitter, which sometimes takes several hours.

• Equipment malfunction

External antennas are exposed to external natural influences every day. Frost, heat, snowstorms and rain - the antenna can withstand all this for years. If it is installed correctly. And if not, then one day moisture will penetrate into the wires, splitters, amplifiers, and the problem will arise at the least expected moment.

• Wrong antenna

The most common reason for poor reception is that the signal level coming from the antenna is too low. The only correct solution would be to use its best model - preferably directional, not necessarily with an amplifier. But the situation can be partially improved by installing the antenna higher.

• Signal strength too high

Excessive intake levels can also be a common cause of problems. Living near a TV tower and using a high gain antenna can overload the signal at the tuner input.

• Cables

Coaxial cable has a significant impact on reception quality. An old cable with frayed insulation, bought at a flea market, or worse - a cable from pieces that you scraped up from barns and barns, can cause such severe attenuation that it will absorb the signal from even a very good antenna before it even reaches the TV .

• Separators and connectors

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The properties and number of splitters used also affect the picture quality. Each such passive element (i.e. one that is not an amplifier) ​​reduces the reception level. Careless installation of connectors, especially outside the home, can lead to rapid oxidation of the connections and, as a result, to significant attenuation of the TV signal.

• Noises

We are surrounded by a lot of transmitting devices - relay stations, mobile phones, modems, routers, radio stations, alarms, etc. Radio waves from different frequency ranges can interfere with TV reception. Even devices without antennas cause interference: microwave ovens, fluorescent lamps, electric cars.

The antenna receives the signal poorly or does not pick up the signal at all

An outdoor antenna does not pick up television signals in all summer cottages. The main reason is their significant distance from the transmitters. According to experts, the normal distance to a TV tower, ensuring reliable reception, is on average 10-15 km. Then an uncertain reception begins, gradually turning into the disappearance of the signal.

This condition is considered especially important when installing a TV in a country house, since, unlike urban multi-storey buildings, their height is quite insignificant. An antenna installed on the roof of a country house is very often covered by trees and other plantings, creating an obstacle to the passage of radio waves. In this case, waves located in the decimeter range, used in many modern television systems, are especially affected.

It is possible to determine the possibility of signal reception by performing calculations. There are special online calculators and computer programs for this, including Satellite Antenna Alignment. It allows you to quite accurately determine the distance at which there is a direct connection between the receiver and the transmitter. The installation height of the outdoor antenna also depends on this parameter. When the receiver is located at the very edge of the radio horizon, an amplifier will most likely be required for the antenna. However, at such distances, even this does not always guarantee reliable and high-quality reception.

This happens for several reasons, which are inherently sources of interference:

• Industrial interference. First of all, these are high-voltage power lines that cross the direction to the TV tower and create a strong electromagnetic field when transmitting electric current over a distance. The same barriers to radio waves are created by air and ground railway communications.
• Natural factors. First of all, this is precipitation in the form of rain and snow, and in some cases, sunlight. Often, natural noise, manifested by air vibrations and other phenomena, becomes interference.